{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "For the first time , phenolic compounds of unheated marjoram were characterised by high - performance liquid chromatography coupled to mass spectrometry ( HPLC - MS ) ."}
{"Chemical": ["phenolic"]}